OF WASHINGTON. 37 



petiole is moderately long, longitudinally striated; the third abdominal 

 segment very slightly shorter than the fourth, the second the longest. 

 Legs clavate, black, pubescent, the tarsi reddish. Wings hyaline, the 

 marginal vein long. 



Hab. Jacksonville, Fla. ; Savannah, Ga. 



Type in Coll. Ashmead. 



The type was reared by me from a dipterous larva, Drosophila 

 sp., feeding in decaying oranges ; there is also another specimen 

 in the National Museum, reared by Dr. Riley, August 29, iSSi. 

 from a dipterous puparium found by Mr. Howard on rice at 

 Savannah, Ga. 



S. haematobise, sp. n. 



9. Length, 2 mm. Blue-black, highly polished, impunctured, except a 

 small oval space on the mesonotum just in front of the scutellum; the 

 parapsides or shoulders are metallic. The oblong head is smooth, im 

 punctured, with a central longitudinal grooved line. 



Mandibles and palpi black. Antennae lo-jointed (scape, pedicel, 7 

 funicle joints and club), subclavate, black; the scape is almost as long as 

 the head, slender and cylindrical; the pedicel long, twice the length of the 

 first funicle joint; the second funicle joint is a little shorter than the first, 

 the joints beyond to the club quadrate ; club inarticulate and about as long 

 as the three preceding joints together. 



The prothorax is about twice the length of the mesonotum, polished, 

 except the narrow neck-like process at the juncture of the head, which is 

 finely, opaquely rugose. Scutellum large, smooth, with a transverse sub- 

 apical impressed line; the post-scutellum is followed by a row of round 

 punctures. Metathorax as long as the scutellum, tricarinated, smooth 

 and shining. Legs blue-black, the posterior femora aeneous; tarsi above 

 fuscous, beneath with a short, dense, pale pubescence. Wings hyaline, 

 strongly iridescent, the venation black ; the submarginal vein reaches the 

 costa at about one-third of the length of the wing, its tip a little incrassated ; 

 marginal vein long, more than two-thirds the length of the submarginal ; 

 the postmarginal and stigmal very short, equal, about thrice as long as 

 thick. 



Hab. Warrenton, Virginia. 



Type in National Museum. 



Described from a single specimen, reared by Dr. Riley Sep 

 tember 13, 1889, from the Horn-fly larva. Hcematobia serrata. 



The paper was briefly discussed by Messrs. Howard and 

 Smith, the latter inquiring whether the Spalangia which has 

 been reared in this country from cow's dung infested by the 

 larvas of the Horn Fly is an imported species. Mr. Ashmead 

 replied that it is new to science, and in all probability a native 

 form. 



